Wanting to upgrade my '06 Escalade that has the Y91 option, lux, to factory navigation.
I've noticed there are some on ebay with p/n 15230099 and 15800001 that wil fit my application. From what I have researched the 15800001 is the latest revision for the 03-06 models.
Would the 15230099 work as well?
Also what would be the latest version mapping disc I could use 5.0?

Thanks in advance.